Side bearing.



E. A. LAUGHLIN.

= SIDE BEARING,

APPLICATION FILED FEB. 17'. 1913.

Patented Dec. 7, 1915.

awmw Cir it. Jr

ELIVIYR It. LAUGHLIN, OF CHICAGO, ILLINGIS.

BEARING.

Specification of Letters Patent.

nted Dec. a, rare.

) Application filed February 17,1913. Serial No. 748,956.

To all whom it may concern:

Be it known that T, ELMYR A. LAUGHLIN, a citizen of the United States of America, and a resident of Chicago, county of Cook, and State of Illinois, have invented certain new and useful improvements in Side Bearings, of which the following is a specification.

The main objects of this invention are to provide an improved form of side bearing for railway cars of the type illustrated in my Patent No. 1,000,926, of August 15, 1911, wherein the ;load is transferred from the roller periphery to the trnnnions when the rollers approach either limit of their travel; to provide an improved form of side bearing of this kind which eliminates all followers or roller carriages and springs; to provide an improvedconstruction of the bearing whereby, when the load is transferred from the periphery of the rollers to the trunnions, the car body is caused to be slightly raised during the relative rotary movement of the truck and car, so that the weight of the car has a tendency to urge the truck into its normal position for travel on a straight track; and to provide improved means adapted to facilitate centering of the rollers in the runways at times when the load is re lieved therefrom.

An illustrative embodiment of this in' vention isshown in the accompanying drawings in which:

Figure l is a bottom plan view of the side bearing. Fig. 2 is a side sectional of the same. vation partly sectional.

In the construction shown in the draw-- ings, a bearing member or frame 4 open at the bottom is provided. with a roller runway 5 and trunnion guideways 6 at opposite sides of the runway. A single roller 7 is mounted in the runway 5 and is provided with trunnions 8 extending into the guide ways 6. The frame at is provided with channels 9 extending into the guideways 6 through which the trunnions 8 are adapted to pass when the roller 7 is being inserted into or removed from the runway '5. When the roller 7 is in place blocks 10 are inserted into the channels which form a continuation of the guidewa'ys G and prevent the displacement of the rollers 7. The blocks 10 are secured on the frame by means of bolts 11 which locate the blocks in place by being ecured to lu s 12 on the sides of the frame.

Fig. 3 is an end ele elevation partly A Weanplate 13 is arranged in the frame at so as to bear upon the periphery of the roller 7 during the intermediate part of its travel. The upper guide surfaces 14- of the guideways 6 are inclined upwardly and in wardly adjacent to the ends of the runway 5. These upper guide surfaces engage the trunnions 8 when the roller approaches either limit of its movement, and transfer the load from the periphery of the roller to the trunnions. The inclination of the guide surfaces 14 also tends to slightly elevate the frame 4-, and'the parts carried above, as the roller reaches the extreme limit of its travel, during the time the car is 1112i;- ing a curve. As the car out of the curve, the inclined surfaces 14. hearing on the trunnions 8 tend. to facilitate the cen tering of the truck with respect to the car.

The lower inclined guide surfaces 15 adapted to normally urge the roller toward afcentral position in the runway ,5 at any time when the load is relieved from the roller. The inner faces of the blocks 10 are made concave, as indicated at 16, so to positively center the roller in the runway 5 when the load is relieved therefrom and pre vent it from rolling back and forth and gradually finding its central position. This depression also prevents to a large extent the throwing of the roller to the end of its runway by momentum, when the application of brakes suddenly checks the speed of the car, and at the same time cauzs a tilting of the trucks on the center bearings and removes the load from the side bearings. A modification of this feature is described and more broadly claimed in my copending application Serial No. 814,921, patented March 9, 1915, No. 1,131,252.

The frame 4r is provided with ears 17 having' apertures 18 by means of which the hearing is secured to the car body.

The operation of the device will be readily understood from the foregoing description.

Although but one specific embodiment of this invention has been herein shown and described, it will be understood that numerous details of the construction shown may be altered or oniitted without departing from the spirit of this invention as defined by the following claims.

I claim 1. A. side bearing, comprising a frame having therein a roller runway, a roller mounted. said runway and have inclined guide surfaces adapted to engage said trunnions when said roller approaches,

the limit of its travel so as to transfer the load from the periphery ofsaid roller to said trunnions. a

2. A sidebearing, comprising a frame having therein a roller runway and guide- Ways at the sides thereof; a roller mounted in said runway and adapted to have a limited range of travel therein, trunnions on said roller, extending into said guideways, said frame having a bearing surface adapted to engage the periphery .of said roller for supporting the load when the roller is in an intermediate part of its travel, said frame having the upper and lower surfaces'of said guideways at opposite sides of the center diverging inwardly, said upper guide surfaces being adapted to engage said trunnions when said roller approaches either limit of its travel so as to transfer the load from theperiphery fiopies is this patent may be gbtained for of said roller to said trunnions, said lower guide surfaces being adapted to engage said trunnions and cause said. roller to center itself in said runway when the load is relieved therefrom.

3. A side bearing, comprising a support having a roller runway formed therein, a roller mounted in said runway and adapted to have a limited range of travel therein, a trunnion on said roller, said frame having a guide surface located to support said trunnion when the load is relieved from said roller, said guide surface being inclined to cause said roller to return by gravity to a substantially central position and having therein a depression serving as a seat for said trunnion when the roller is 1n such central position, said depression having abrupt shoulders at its ends for confining the roller definitely in such central position.

Signed at-Chicago this 13th day of February 1913.

ELMYR' A. LAUGHLIN;

Witnesses:

EUGENE A. RUMMLER, M. IRENE Hurcrnnes.

five cents each,'by'addressing the commissiomirfel Patents. Washington, D. O. 

